DE69021348D1 - Friability test device. - Google Patents

Friability test device.

Info

Publication number
DE69021348D1
DE69021348D1 DE69021348T DE69021348T DE69021348D1 DE 69021348 D1 DE69021348 D1 DE 69021348D1 DE 69021348 T DE69021348 T DE 69021348T DE 69021348 T DE69021348 T DE 69021348T DE 69021348 D1 DE69021348 D1 DE 69021348D1
Authority
DE
Germany
Prior art keywords
vibrator
microprocessor
test device
provides
friability test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69021348T
Other languages
German (de)
Other versions
DE69021348T2 (en
Inventor
Douglas James Reid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANNON IND DISTRIBUTORS
Original Assignee
SHANNON IND DISTRIBUTORS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANNON IND DISTRIBUTORS filed Critical SHANNON IND DISTRIBUTORS
Publication of DE69021348D1 publication Critical patent/DE69021348D1/en
Application granted granted Critical
Publication of DE69021348T2 publication Critical patent/DE69021348T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/389—Precious stones; Pearls
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56—Investigating resistance to wear or abrasion
    • G01N3/565—Investigating resistance to wear or abrasion of granular or particulate material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Confectionery (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The invention provides a friability testing apparatus which has an electrically excitable vibrator (10,12) for vibrating a capsule (14) containing material to be tested. The apparatus includes a microprocessor (20) which provides an output waveform with a frequency which is determined by an oscillator (22). The output of the microprocessor drives a power amplifier (18) which controls the vibrator. An accelerometer (16) supplies a feedback signal to the microprocessor, so that the operation of the vibrator is maintained within predetermined limits.
DE69021348T 1989-12-12 1990-12-10 Friability test device. Expired - Fee Related DE69021348T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE8901322A BE1002570A3 (en) 1989-12-12 1989-12-12 FRIABILITY TEST APPARATUS.

Publications (2)

Publication Number Publication Date
DE69021348D1 true DE69021348D1 (en) 1995-09-07
DE69021348T2 DE69021348T2 (en) 1996-01-04

Family

ID=3884419

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021348T Expired - Fee Related DE69021348T2 (en) 1989-12-12 1990-12-10 Friability test device.

Country Status (11)

Country Link
US (1) US5140857A (en)
EP (1) EP0432980B1 (en)
JP (1) JP2781465B2 (en)
KR (1) KR0154981B1 (en)
AT (1) ATE125943T1 (en)
AU (1) AU638513B2 (en)
BE (1) BE1002570A3 (en)
CA (1) CA2031953C (en)
DE (1) DE69021348T2 (en)
IE (1) IE68435B1 (en)
ZA (1) ZA909990B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457345B1 (en) 1996-07-22 2002-10-01 Genencor International, Inc. Repeated impact apparatus and method for characterizing granule strength
US6035716A (en) * 1996-07-22 2000-03-14 Genencor International, Inc. Method and device for characterizing granule strength
US6397678B1 (en) * 2001-05-04 2002-06-04 Shay Popper Method and apparatus for measuring objects, particularly useful for measuring diamonds
GB201307807D0 (en) 2013-04-30 2013-06-12 Element Six Ltd Tester apparatus for super-abrasive grains
JP6367136B2 (en) * 2015-02-16 2018-08-01 国立研究開発法人産業技術総合研究所 Method for quantifying action energy in powder handling equipment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828622A (en) * 1954-09-15 1958-04-01 Gross Martin Robert Automatic amplitude controller for vibration fatigue machine
US2844777A (en) * 1955-11-16 1958-07-22 Ling Electronics Inc Vibrator servo amplifiers
US3141325A (en) * 1958-12-30 1964-07-21 Textron Electronics Inc Specimen acceleration limiter for vibration exciter
US3636772A (en) * 1970-02-24 1972-01-25 Dow Chemical Co Device for measuring the friability of particulate solid materials
US4004449A (en) * 1975-06-30 1977-01-25 International Business Machines Corporation Impact sound stressing for semiconductors
JPS53116859A (en) * 1977-03-23 1978-10-12 Hitachi Ltd Hydraulic type vibration tester
JPS55114930A (en) * 1979-02-28 1980-09-04 Hitachi Ltd Stable control unit of vibration test machine
US4733151A (en) * 1987-05-29 1988-03-22 Ling Electronics, Inc. Control system for vibration testing apparatus

Also Published As

Publication number Publication date
JPH04208838A (en) 1992-07-30
AU6770690A (en) 1991-06-20
US5140857A (en) 1992-08-25
IE68435B1 (en) 1996-06-12
KR910012696A (en) 1991-08-08
BE1002570A3 (en) 1991-03-26
EP0432980A1 (en) 1991-06-19
DE69021348T2 (en) 1996-01-04
EP0432980B1 (en) 1995-08-02
ATE125943T1 (en) 1995-08-15
IE904470A1 (en) 1991-06-19
JP2781465B2 (en) 1998-07-30
KR0154981B1 (en) 1998-12-01
ZA909990B (en) 1991-10-30
CA2031953C (en) 1997-11-11
AU638513B2 (en) 1993-07-01
CA2031953A1 (en) 1991-06-13

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee